| Price | $12 |
|---|---|
| Category | Microcontrollers |
| Availability | In stock |
| Delivery | Shipped across Lebanon, or collect from the lab |
A microcontroller and a long-range LoRa radio on one 3.3V board. An ATmega32U4 running at 8 MHz with native USB is wired over SPI to an RFM95W (Semtech SX1276) transceiver putting out up to +20 dBm - good for a couple of kilometres line of sight on a simple wire antenna, far more with a directional one. A 2-pin JST connector takes a lithium cell, and there is a u.FL socket for an external antenna, so it makes a genuinely off-grid telemetry node. Sold in regional 868 MHz and 915 MHz versions.
Key features
- ATmega32U4 at 8 MHz with native USB, programmed from the Arduino IDE
- RFM95W (SX1276) LoRa radio on SPI, up to +20 dBm
- 868 MHz or 915 MHz depending on region - pick to match local rules
- ~2 km line of sight on a simple wire antenna
- u.FL antenna socket and a 2-pin JST lithium battery connector
- ~100 mA peak on transmit, ~30 mA receiving
- 3.3V logic - not 5V tolerant
Details
Specifications
| Model | LoRa32u4 II |
|---|---|
| Microcontroller | ATmega32U4 |
| Clock speed | 8 MHz (3.3V operation) |
| Flash memory | 32 KB |
| SRAM | 2.5 KB |
| EEPROM | 1 KB |
| Radio | RFM95W (Semtech SX1276) LoRa, SPI |
| Frequency | 868 MHz or 915 MHz (regional version) |
| Transmit power | up to +20 dBm |
| Radio current | ~100 mA peak TX, ~30 mA RX |
| Operating voltage | 3.3V |
| Antenna | u.FL / IPEX socket |
| Battery | 2-pin JST lithium connector |
| USB connector | Micro-USB (native USB) |
| ADC resolution | 10-bit |
